Highly porous and mechanically robust polyester poly(ethylene glycol) sponges as implantable scaffolds

Journal article


Ozcelik, Berkay, Blencowe, Anton, Palmer, Jason, Ladewig, Katharina, Stevens, Geoffrey, Abberton, Keren, Morrison, Wayne and Qiao, Greg. (2014) Highly porous and mechanically robust polyester poly(ethylene glycol) sponges as implantable scaffolds. Acta Biomaterialia. 10(6), pp. 2769 - 2780. https://doi.org/10.1016/j.actbio.2014.02.019
AuthorsOzcelik, Berkay, Blencowe, Anton, Palmer, Jason, Ladewig, Katharina, Stevens, Geoffrey, Abberton, Keren, Morrison, Wayne and Qiao, Greg
Abstract

The development of suitable scaffolds plays a significant role in tissue engineering research. Although scaffolds with promising features have been produced via a variety of innovative methods, there are no fully synthetic tissue engineering scaffolds that possess all the desired properties in one three-dimensional construct. Herein, we report the development of novel polyester poly(ethylene glycol) (PEG) sponges that display many of the desirable scaffold characteristics. Our novel synthetic approach utilizes acid chloride/alcohol chemistry, whereby the reaction between a hydroxyl end-functionalized 4-arm PEG and sebacoyl chloride resulted in cross-linking and simultaneous hydrogen chloride gas production, which was exploited for the in situ formation of highly interconnected pores. Variation of the fabrication conditions, including the precursor volume and concentration, allowed the pore size and structure as well as the compressive properties to be tailored. The sponges were found to possess excellent elastic properties, preserving their shape even after 80% compressive strain without failure. The benign properties of the sponges were demonstrated in an in vivo subcutaneous rat model, which also revealed uniform infiltration of vascularized tissue by 8 weeks and complete degradation of the sponges by 16 weeks, with only a minimal inflammatory response being observed over the course of the experiments.

KeywordsPolyethylene glycol; Scaffold; Biocompatibility; Biodegradation
Year2014
JournalActa Biomaterialia
Journal citation10 (6), pp. 2769 - 2780
ISSN1878-7568
Digital Object Identifier (DOI)https://doi.org/10.1016/j.actbio.2014.02.019
Page range2769 - 2780
Publisher's version
File Access Level
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